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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (MAPREDUCE-2365) Add counters for FileInputFormat (BYTES_READ) and FileOutputFormat (BYTES_WRITTEN)
Date Mon, 07 Mar 2011 22:21:59 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley reassigned MAPREDUCE-2365:
----------------------------------------

    Assignee: Siddharth Seth

> Add counters for FileInputFormat (BYTES_READ) and FileOutputFormat (BYTES_WRITTEN)
> ----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2365
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2365
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Owen O'Malley
>            Assignee: Siddharth Seth
>
> MAP_INPUT_BYTES and MAP_OUTPUT_BYTES will be computed using the difference between FileSystem
> counters before and after each next(K,V) and collect/write op.
> In case compression is being used, these counters will represent the compressed data
sizes. The uncompressed size will
> not be available.
> This is not a direct back-port of 5710. (Counters will be computed in MapTask instead
of in individual RecordReaders).
> 0.20.100 ->
>    New API -> MAP_INPUT_BYTES will be computed using this method
>    Old API -> MAP_INPUT_BYTES will remain unchanged.
> 0.23 ->
>    New API -> MAP_INPUT_BYTES will be computed using this method
>    Old API -> MAP_INPUT_BYTES likely to use this method

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